I don't know why Dolphin is slow on my build.

[CLX]

Hey,

I was trying to emulate Silent Hill: Shattered Memories. From the first actual gameplay on, I get no more than 50%. Other games have problems too. Any ideas?
My build:
i7-4770K @ 4.3GHz
NVidia GTX 770 (drivers are up-to-date)
16GB RAM

I've tried with the latest stable, RC and dev builds. I'm getting low fps with even the lowest possible settings (1x, no AA or AF, all advanced options set to max performance)

Thanks in advance for any help you could offer.